Yamaha 8hp 2 stroke no water coming out / overheating

[anamealreadyinuse]

I have a Yamaha 8 HP 2 Stroke that is not getting a steady stream of water. Today I took a can of canned air and tried to blow out from the input where you normally put the muffs and also from the output direction. I did this twice and it worked like a charm but within 10 min. I watched it slowly stop putting out the stream of water to nothing. The impeller/water pump was replaced within the past year but I have no idea if it worked before or not.

Is there a way to clean this out without pulling the unit? There appears to be a weed guard where you put the muffs, can I remove those and somehow vacuum or blow that out? I am not sure what is behind the weed guard? I believe the motor is a 2002 or possibly a bit older but it's never been run much.

What do you recommend? Thanks in advance for your help. FYI, I am a total newbie to marine engines so please be as specific as possible.

 

[pscrabber59]

Re: Yamaha 8hp 2 stroke no water coming out / overheating

Blowing canned air through the water intake won't really do much help, but using a compressed-air through the pee-hole will work sometimes if their are bugs, spider webs clogging the discharge hole. Has this motor been used in salt-water? I had a 1995 6hp-2-stroke yamaha that was just caked with salt throughout the water passages. What a pain to clean out. Ck your T-Stat to see if its working before you drop the LU to inspect the impeller. You might want to invest in a service manual or try your local library if they have a service manual.

 

[anamealreadyinuse]

Re: Yamaha 8hp 2 stroke no water coming out / overheating

Got it, today I used a air compressor to blow it out from the input and output and verified the chamber was free of blockage. I did notice that while running the motor that I feel hot air coming out but no water?

Does that indicate the water pump is not working or could it be the t-stat? Is there anyplace I can find step-by-step instructions on how to test the t-stat? At this point I am unsure of where it even is. Thanks for the help.

 

[guitarguy15]

Re: Yamaha 8hp 2 stroke no water coming out / overheating

I would suggest replacing the water pump, seems logical

 

[anamealreadyinuse]

Re: Yamaha 8hp 2 stroke no water coming out / overheating

Okay, thanks for the help...ordering the kit today!